Author/Authors :
Ataei، A نويسنده Center for Environmental Studies / Green Energy Center, Dept. of Environmental Science and Engineering, College of Engineering, Kyung Hee University, Seocheon-dong , 1 Giheung-gu, Yongin-Si, Gyeonggi-Do, 446-701, Korea , , Yoo، C K نويسنده Center for Environmental Studies / Green Energy Center, Dept. of Environmental Science and Engineering, College of Engineering, Kyung Hee University, Seocheon-dong , 1 Giheung-gu, Yongin-Si, Gyeonggi-Do, 446-701, Korea ,
Abstract :
In this paper, a new systematic design methodology has been developed for the
simultaneous energy and water minimization in multiple-contaminant systems that also feature
maximum re-use of water. In addition to allowing re-use of water in multiple-contaminant systems,
issues about heat losses and flowrate changes inside unit operations have also been incorporated
in this new design method. To implement such a design, two new design aspects are introduced;
new method for “Non-isothermal Mixing” point identification and new “Separate System” generation.
The first aspect involves “non-isothermal mixing”, which enables direct heat recovery between
water streams, and therefore allows the reduction of the number of heat transfer units. The other
aspect is the generation of “separate system “in heat exchanger network design. The flexibility of
mixing and splitting of water streams allows separate systems to be created as a cost-effective series
of heat-exchanger units between freshwater and wastewater streams. The new design aspects have
been illustrated with two examples.
